Wyeth This workflow corresponds to n8n.io template #5419 — we link there as the canonical source.
The workflow JSON
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{
"id": "A2JB4uRp5waIV6yk",
"meta": {
"templateCredsSetupCompleted": true
},
"name": "FormLoadFileExample",
"tags": [],
"nodes": [
{
"id": "be53d6d3-2416-482e-a714-4573fed4bfbb",
"name": "Loop Over Items",
"type": "n8n-nodes-base.splitInBatches",
"position": [
-440,
-460
],
"parameters": {
"options": {}
},
"typeVersion": 3
},
{
"id": "699f5089-7416-414a-8e95-3bdb8637a6d9",
"name": "Save Each File",
"type": "n8n-nodes-base.readWriteFile",
"position": [
-240,
-400
],
"parameters": {
"options": {
"append": false
},
"fileName": "=out_{{ $json.files.filename }}",
"operation": "write",
"dataPropertyName": "=files_{{$runIndex}}"
},
"typeVersion": 1
},
{
"id": "c8c5f9e6-670b-405b-af1d-72eeb372303e",
"name": "Split Out Files",
"type": "n8n-nodes-base.splitOut",
"position": [
-780,
-460
],
"parameters": {
"options": {
"includeBinary": true,
"destinationFieldName": "=files"
},
"fieldToSplitOut": "=files"
},
"executeOnce": false,
"typeVersion": 1
},
{
"id": "8f7252ac-4082-49b8-9e56-9d14689ee864",
"name": "Form - Load Multiple Files",
"type": "n8n-nodes-base.formTrigger",
"position": [
-1220,
-460
],
"parameters": {
"options": {},
"formTitle": "LOAD MULTIPLE FILES",
"formFields": {
"values": [
{
"fieldType": "file",
"fieldLabel": "files",
"requiredField": true,
"acceptFileTypes": "*.json"
}
]
},
"formDescription": "Select multiple json files to run this example."
},
"typeVersion": 2.2
},
{
"id": "72ee0e48-9a75-4c7d-af09-bcd5bbc5b2ba",
"name": "Sticky Note",
"type": "n8n-nodes-base.stickyNote",
"position": [
-1400,
-760
],
"parameters": {
"width": 1740,
"height": 140,
"content": "## Learning n8n\n### Loops, Multiple Binary Files, {{$runIndex}}\n\nLoops are rarely needed in n8n, but here is one example of how to effectively use one to process multiple binary files."
},
"typeVersion": 1
},
{
"id": "962e91d5-eb75-4245-9dfb-4b13c15cdb0a",
"name": "Sticky Note1",
"type": "n8n-nodes-base.stickyNote",
"position": [
-1400,
-600
],
"parameters": {
"color": 6,
"width": 480,
"height": 400,
"content": "Use a Form to load multiple files. \n\nThis is a case where n8n will NOT fire an event per file loaded, but instead a single event with all files nested into 1 array. \nHowever, we want to process the files one at a time..."
},
"typeVersion": 1
},
{
"id": "2aee5134-abc4-45f9-a2db-cf205f18cff7",
"name": "Sticky Note2",
"type": "n8n-nodes-base.stickyNote",
"position": [
-900,
-600
],
"parameters": {
"color": 6,
"width": 360,
"height": 400,
"content": "Split Out will fix this, firing one event for each file.\n\n*We must make sure to pass binary data along.*"
},
"typeVersion": 1
},
{
"id": "1ec83469-5dcd-4beb-9414-7f75a0727ed3",
"name": "Sticky Note3",
"type": "n8n-nodes-base.stickyNote",
"position": [
-520,
-600
],
"parameters": {
"color": 6,
"width": 460,
"height": 400,
"content": "Now we can use a Loop to handle each file, one at a time.\nWith this setup, the special {{$runIndex}} can be used to get our loop counter.\n\nWe use it to get the correct binary file, which has been inconveniently passed downstream as files_0, files_1, files_2... etc."
},
"typeVersion": 1
},
{
"id": "2545fa3e-346b-4277-b494-f1c2d469dceb",
"name": "Continue Once",
"type": "n8n-nodes-base.noOp",
"position": [
60,
-480
],
"parameters": {},
"executeOnce": true,
"typeVersion": 1
},
{
"id": "d1646761-2962-4afb-9033-d13f7d853290",
"name": "Sticky Note4",
"type": "n8n-nodes-base.stickyNote",
"position": [
-40,
-600
],
"parameters": {
"color": 6,
"width": 380,
"height": 400,
"content": "We typically only want to proceed downstream with a single event, so this NOP set to \"run once\" will let us do that regardless of the file count."
},
"typeVersion": 1
}
],
"active": false,
"settings": {
"executionOrder": "v1"
},
"versionId": "21acb21b-3bca-4279-9725-7d4fcd88b25f",
"connections": {
"Continue Once": {
"main": [
[]
]
},
"Save Each File": {
"main": [
[
{
"node": "Loop Over Items",
"type": "main",
"index": 0
}
]
]
},
"Loop Over Items": {
"main": [
[
{
"node": "Continue Once",
"type": "main",
"index": 0
}
],
[
{
"node": "Save Each File",
"type": "main",
"index": 0
}
]
]
},
"Split Out Files": {
"main": [
[
{
"node": "Loop Over Items",
"type": "main",
"index": 0
}
]
]
},
"Form - Load Multiple Files": {
"main": [
[
{
"node": "Split Out Files",
"type": "main",
"index": 0
}
]
]
}
}
}
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About this workflow
Let a user load multiple files with a Form node, and process the binary data. A very important workflow for many tools.
Source: https://n8n.io/workflows/5419/ — original creator credit. Request a take-down →
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